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New TCM codes for 4PSK-2PSK modulation

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2 Author(s)
Szulakiewicz, P. ; Politech. Poznanska Inst. Elektron. i Telecommun. ; Kotrys, R.

The authors present some new multi-dimensional (3-D, 4PSK-2PSK) and 180° rotationally invariant trellis codes that combined with the demodulator (which locks onto the 2PSK signal of the 3-D signal set) allows robust operation at low signal to noise ratios. Examples of the codes are presented for 2, 4, 8, 16 and 32 states. The codes achieve a coding gain of 1.76 dB (for two encoder states) to 5.44 dB (for 42 encoder states) compared to uncoded BPSK. Distance profiles of the codes are shown

Published in:

Electronics Letters  (Volume:30 ,  Issue: 13 )